do your best to find a teacher. flamenco has a rich history and is an oral tradition. There are no books that can accurately teach flamenco. Any attempt to learn flamenco in this way will sound too mechanical and academic.

the rasgueado technique itself (from the book above) and punteado (similar to the CG apoyando) techniques are very technical and are a great way to get your feet wet. when it comes to learning the falsetas, try to find online lessons.

To clarify, the book does a good job of teaching the technique which can then be refined by a teacher

Well what do you know? I, too have developed some interest in Flamenco. I'm not very familiar, though. I started a thread on Paco De Lucia to see if I could get some recommendations, though. He's really good.

I've some remains of the largely inactive Flamenco Club, still. And I do tend to keep an eye out if anyone is interested in learning more, so you're welcome to read around there, and ask if things are unclear. I haven't gotten around to putting down most of what I know, but I will answer what I can, as it's more likely to happen than that I get back to typing articles.